Hi Muhammad,
It seems that once SAP DB Software was installed and then only the software was deleted without the registry entries.
if there is no other MAXDB/SAPDB/liveCache software installed ont this
server , please :
-> delete <Drive>:\sapdb directory
-> uninstall all registries , please use tool provided by SAP note 572836
-> reboot server
-> start installation again
Hope this helps.
Regards,
Deepak Kori